consolidated guidelines on ‘Deputation’ have been issued by DOP&T vide their O.M.No.6/8/2009-Estt(Pay-II) dated 17-06-2010 followed by various clarifications which have been adopted/circulated on the Railways vide Board’s letter No.2010/F(E)II/I(I)/I dated 28.07.2010, 28.06.2013, 21.04.2016 & 19.06.2017